APA-viite

Theis, K. A., Helmick, C. G., Hootman, J. M., & Barbour, K. E. (2014). Physical Activity Among Adults With Arthritis [Letter]. Centers for Disease Control and Prevention.

Chicago-tyylinen lähdeviittaus

Theis, Kristina A., Charles G. Helmick, Jennifer M. Hootman, ja Kamil E. Barbour. Physical Activity Among Adults With Arthritis [Letter]. Centers for Disease Control and Prevention, 2014.

MLA-viite

Theis, Kristina A., Charles G. Helmick, Jennifer M. Hootman, ja Kamil E. Barbour. Physical Activity Among Adults With Arthritis [Letter]. Centers for Disease Control and Prevention, 2014.

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